Flange Connection On Nozzles - Emerson Rosemount 3308A Reference Manual

Installation
August 2017
3.3.2

Flange connection on nozzles

Figure 3-3. Mounting in Nozzles
A. Maximum nozzle height
B. Minimum nozzle diameter
The transmitter can be mounted in nozzles by using an appropriate flange. It is recommended that the
nozzle size is within the dimensions given in
Note
The probe must not be in contact with the nozzle (except for the coaxial probe).
Table 3-2. Nozzle Considerations
Recommended
nozzle diameter
Minimum nozzle
diameter
Maximum nozzle
(2)
height
1. The Trim Near Zone (TNZ) function may be necessary or an Upper Null Zone (UNZ) setup may be required to mask the nozzle.
2. Recommended maximum nozzle height. For coaxial probes there is no limitation on nozzle height.
3. For nozzles taller than 4 in. (100 mm), the Long Stud version is recommended (option code LS) to prevent the flexible portion from touching
the edge of the nozzle.
18
PRELIMINARY
A
B
Flexible single
lead probe
4 in. (100 mm) or
more
1.5 in. (38 mm)
(1)
4 in. (100 mm)
+ nozzle diameter
Table 3-2.
Rigid single lead
probe/Segmented
rigid single lead
4 in. (100 mm) or
more
1.5 in. (38 mm) for
probe type 4A
2 in. (50 mm) for
probe type 4B and 4S
4 in. (100 mm)
(3)
+ nozzle diameter
Reference Manual
00809-0100-4308, Rev CA
Flexible twin Coaxial probe
lead probe
4 in. (100 mm) or
> probe diameter
more
2 in. (50 mm) > probe diameter
4 in. (100 mm)
N/A
+ nozzle diameter
Installation